Calcium supplement for birds. The calcium block for poultry is a specific supplement in their daily diet. It provides them with natural entertainment while helping to keep their bones and plumage healthy. It is very useful to prevent the overgrowth of the beak of our birds and essential in breeding seasons when the need for mineral supply is even greater for females. The block is easily fixed inside the cage. Always make sure you have clean, fresh water at your fingertips. Color: WHITE